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Plastic composite modification methods

by:CSSSLD     2021-01-23
Article/VIP
plastic injection tooling composite modified by adhesive and hot melt method will be more than two layer or two layers of materials such as films and sheeting composite together and a method of multilayer film, sheet material such as. Plastic composite modification is actually plastic blending modification method of middle blend of extremes, can also be seen as a special kind of plastic blending modification.


the purpose of plastic composite modified packaging material requirement transparent, soft, high mechanical strength, durability, sealing with high intensity, good gas barrier property, moisture, high and low temperature resistance and corrosion resistance, etc, and the varieties of a single thin film has its own inherent limitation, can not fully meet the above requirements. And use a variety of different membrane materials of their respective advantages, will two or over two kinds of thin film materials compound, formed a kind of multilayer film packaging material, can be integrated with one's own advantage, to adapt to the different packaging needs. Such as packing should be high temperature sterilization, packing to vacuum packing, packing should be frozen, some packing to protect the interior of the food itself water, wine, oil, acid, sweet, and so on composition of corrosion effect.

plastic compound modification to solve a variety of plastic and cannot solve the problem.
to improve the gas and liquid separation performance. For modified atmosphere packaging, requires less oxygen in bags, which requires the membrane resistance high oxygen capacity; For carbonated beverages, beer, insist on internal CO2 gas bag don't spill over, to maintain its original taste; For liquor, cosmetics, essence, tea packaging, insist on various smell don't spill.
to improve the printing fastness. For the film, due to their high surface adhesion characteristics, combined with the ink fastness is lower, in order to prevent ink in use affected by wear, such as hot and wet and fall off, can be in a layer of transparent film surface recombination ink thereof, to increase the ink printing firm.

to improve the sealing. Because of viscosity between film fastness is not high, so for packaging bags, its sealing fastness is not high, by other sealing compound high strength material, can greatly improve the sealing strength.

plastic composite modified method
plastic composite modification method has a lot of kinds, mainly dry compound modification, wet composite modification, solvent-free composite modification, a total of extrusion compound modification and extrusion coating compound modification, five.

the development of plastic composite modified
1 composite layer multiple stratification, there are twenty layer composite materials.
2。 The adhesive of solvent-free. Solvent-free adhesive composite is characterized by simple process, less investment, ruling, pollution-free.
3。 No adhesive composite way. Both can reduce the cost, and can improve health.

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